Netscape Authentication failure with IIS 4.0

Netscape Authentication failure with IIS 4.0


Hi, we have a secure server that has anonymous Web Access removed from the relevant directories. This works fine with Internet Explorer, but with Netscape it fails completely. Whatever username / password you enter from Netscape always gets rejected with:

HTTP Error 401
401.3 Unauthorized: Unauthorized due to ACL on resource

Many Thanks for any help,
Cormac Murphy


Since IE users have no problem, it sounds like Internet Information Server is configured to use Windows NT Challenge/Response authentication. Netscape doesn’t support that form of authentication.

Go into Internet Service Manager and open the property page for the Web. Click the Directory Security tab and uncheck Windows NT challenge/ response and check Basic Authentication. If all goes well, Netscape users will get in.

Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several